用C#绘制曲线图.doc

用C#绘制曲线图
照例先上图:

比以前Cool吧?呵呵,其实就是根据数据自动计算边距和字体等.
///<summary>
///自动根据参数调整图像大小
///</summary>
PublicvoidFit()
{
//计算字体距离
intFontSpace=FontSize+5;
//计算图像边距
FloatfltSpace=Math.Min(Width/6,Height/6);
XSpace=fltSpace;
YSpace=fltSpace;
//计算X轴刻度宽度
XSlice=(Width-2*XSpace)/(Keys.Length-1);
//计算Y轴刻度宽度和Y轴刻度开始值
floatfltMinValue=0;
floatfltMaxValue=0;
for(inti=0;i<Values.Length;i++)
{
if(Values[i]<fltMinValue)
{
fltMinValue=Values[i];
}
elseif(Values[i]>fltMaxValue)
{
fltMaxValue=Values[i];
}
}
if(YSliceBegin>fltMinValue)
{
YSliceBegin=fltMinValue;
}
intintYSliceCount=(int)(fltMaxValue/YSliceValue);
if(fltMaxValue%YSliceValue!=0)
{
intYSliceCount++;
}
YSlice=(Height-2*YSpace)/intYSliceCount;
}

看我把数据缩小一个级别的效果:

因为代码里面充斥了大量注释,也不敲太多文字了..完整代码奉上:

usingSystem;usingSystem.Collections.Generic;usingSystem.Text;usingSystem.Drawing;usingSystem.Data;usingSystem.Drawing.Drawing2D;namespaceSarchPMS.Business.Draw{publicclassDrawingCurve:DrawingChart{///<summary>///画曲线图///</summary>///<paramname="dsParameter"></param>///<returns></returns>publicoverrideBitmapDrawImage(DataSetdsParameter){Curve2Dcuv2D=newCurve2D();cuv2D.Fit();returncuv2D.CreateImage();}}publicclassCurve2D{privateGraphicsobjGraphics;//Graphics类提供将对象绘制到显示设备的方法privateBitmapobjBitmap;//位图对象privatefloatfltWidth=480;//图像宽度privatefloatfltHeight=248;//图像高度privatefloatfltXSlice=50;//X轴刻度宽度privatefloatfltYSlice=50;//Y轴刻度宽度privatefloatfltYSliceValue=20;//Y轴刻度的数值宽度privatefloatfltYSliceBegin=0;//Y轴刻度开始值privatefloatfltTension=0.5f;privatestringstrTitle="曲线图";//标题privatestringstrXAxisText="月份";//X轴说明文字privatestringstrYAxisText="万元";//Y轴说明文字privatestring[]strsKeys=newstring[]{"一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"};//键privatefloat[]fltsValues=newfloat[]{20.0f,30.0f,50.0f,55.4f,21.6f,12.8f,99.5f,36.4f,78.2f,56.4f,45.8f,66.5f,99.5f,36.4f,78.2f,56.4f,45.8f,66.5f,20.0f,30.0f,50.0f,55.4f,21.6f,12.8f};//值privateColorclrBgColor=Color.Snow;//背景色privateColorclrTextColor=Color.Black;//文字